Bill Hammack of Engineer Guy explains the engineering behind the cylinder shaped aluminum can. He demonstrates why the can is an example of brilliant product design by highlighting the space and volume of the can, the thickness of the aluminum, and the process of making it. He also discusses the pull-tab and the drawbacks of it. The beverage industry responded by creating the intelligent design of the modern stay-on-tab we see on all the cans today. Hammack goes into detail about the engineering behind the clever stay-on-tab design.